Storage apparatus, seek control method and program
AssigneeFujitsu Limited
InventorsTakahiro Aoki, Shunji Saitoh
Life of this patent
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Abstract
A movement controlling unit performs movement control of a head toward a target track on a magnetic disk medium driving a head actuator, and a position controlling unit performs position control of the head actuator in accordance with proportional integral calculations such that a deviation of a head position relative to a track center is eliminated when the moving head arrives at the target track. A gain retaining unit retains an integral gain of the proportional integral calculations in an increased state during a predetermined retention time from the start of the position control, and a gain switching unit switches the increased integral gain smoothly to the original integral gain when the retention time has elapsed.
Claims20
A storage apparatus comprising:
- a head actuator that positions a head at a position on a medium;
- a movement controlling unit that performs movement control of a head toward a target track on a medium by driving the head actuator;
- a position controlling unit that performs position control of the head actuator in accordance with proportional integral calculations such that a deviation of a head position relative to a track center is eliminated when the moving head arrives at the target track;
- a gain retaining unit that retains an integral gain of the proportional integral calculations in an increased state during a predetermined retention time from the start of the control of the position controlling unit;
- and
- a gain switching unit that switches the increased integral gain smoothly to the original integral gain when the retention time has elapsed.
A storage apparatus seek control method comprising:
- a movement controlling step of performing movement control of a head toward a target track on a medium by driving a head actuator;
- a position controlling step of performing position control of the head actuator in accordance with proportional integral calculations such that a deviation of a head position relative to a track center is eliminated when the moving head arrives at the target track;
- a gain retaining step of retaining an integral gain of the proportional integral calculations in an increased state during a predetermined retention time from the start of the position control of the position controlling step;
- and
- a gain switching step of switching the increased integral gain smoothly to the original integral gain when the retention time has elapsed.
A control apparatus comprising:
- a movement controlling unit that performs movement control of a head toward a target track on a medium by driving a head actuator;
- a position controlling unit that performs position control of the head actuator in accordance with proportional integral calculations such that a deviation of a head position relative to a track center is eliminated when the moving head arrives at the target track;
- a gain retaining unit that retains an integral gain of the proportional integral calculations in an increased state during a predetermined retention time from the start of the control of the position controlling unit;
- and
- a gain switching unit that switches the increased integral gain smoothly to the original integral gain when the retention time has elapsed.
Dependencies are inferred from the claim text.